I'm a new player (Iron 3) and I'm not sure if I'm doing things right or wrong or what's going to help or hinder me. Is there any bad habits I should get rid of or good habits I should learn?

Me and my friend is having a pointless discussion, the discussion is about if the ending is unlucky or not. I would say that it is, he says that I could've played that a lot better. I'd like to know what you guys think :D https://reddit.c...